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P0566 OBD2: Cruise Control "Off" Signal

P0566 OBD2: Cruise Control “Off” Signal

The P0566 OBD-II code indicates an issue with the cruise control system, specifically related to the “Off” signal. This code is triggered when the Body Control Module (BCM) detects an invalid input from the cruise control “Off” switch.

What Does the P0566 Code Mean?

The P0566 code means that the cruise control system is unable to operate due to a fault in the signal from the cruise control “Off” switch. This signal is crucial for the proper functioning of the cruise control, as it helps the vehicle’s onboard system understand when to deactivate cruise control.

What Causes the P0566 Code?

Several factors can lead to the P0566 code being set, including:

  • Body Control Module (BCM) failure
  • Cruise control master switch failure
  • Wiring issues affecting the cruise control system

What Are the Symptoms of the P0566 Code?

The primary symptom of the P0566 code is that the cruise control will not operate. You may also notice that the cruise control indicator light on the dashboard does not illuminate when activated.

How Serious Is the P0566 Code?

The P0566 code is classified as a moderate severity issue. While it might not pose an immediate threat to the vehicle’s safety or functionality, it is advised to have it diagnosed within a reasonable timeframe. Ignoring this code could lead to further complications with the cruise control system.

How to Diagnose the P0566 Code

To properly diagnose the P0566 code, a mechanic will typically:

  • Use an OBD-II scanner to retrieve the code and any related codes.
  • Inspect the cruise control master switch and wiring for any visible issues.
  • Check the Body Control Module for faults or failures.
  • Perform tests to ensure the proper function of the cruise control system.

Common Repairs for the P0566 Code

Common repairs associated with the P0566 code may include:

  • Replacing the Body Control Module (BCM)
  • Repairing or replacing the cruise control master switch
  • Fixing any wiring issues or shorts in the cruise control system

How Much Does It Cost to Fix the P0566 Code?

The cost to fix the P0566 code can vary depending on the specific issue and the make and model of the vehicle. Generally, you might expect to pay between $100 to $600 for repairs, including parts and labor.

Can I Fix the P0566 Code Myself?

If you have experience with automotive repair and access to the necessary tools, you may be able to diagnose and fix the P0566 code yourself. However, due to the complexity of the cruise control system, it is often recommended to consult with a professional mechanic to ensure a proper diagnosis and repair.

About JC Landry

JC is the Senior Editor at eManualOnline.com, GarageSpot.com, and Drive-My.com, as well as the Webmaster of TheMechanicDoctor.com, only to name a few. He's been a certified Master Mechanic for 15 years, working for various car dealers and specialized repair shops before turning towards blogging about cars and EVs in the hope of helping the next generation of automotive technicians. He also loves cats, Johnny Cash and Subarus.

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